PLATE X. 
'i.ir. Pao'e 
O ZJ 
1. 3I(ei'itherit(m lyonHi, Andrews; left ramus of mandible, with the molars and 
])romolars, upper and (1 a) outer views ; the posterior portion is restored 
in outline from other specimens : one-half nat. size. Qasr-el-Saa’ha beds 
(Middle Eocene). 
[Type specimen, C. 10000. J 
108 
Ditto ; right upper cheek-teeth, crown view : one-half nat. size. Same 
horizon. 
[C. 10001.] 
100 
Ditto; anterior portion of skull, side view; one-half nat. size. Same 
horizon. 
[C. 10002.] 
99 
Ditto ; posterior portion of the same skull, upper and (4 a) posterior views ; 
one-half nat. size. Same horizon. 
[C. 10002. 1 
99 
Ditto ; crown of last upper molar ; one- 
half nat. size. Same horizon. 
| M. 8902.1 
108 
(t.o.f., aiitorbital foramen. 
na., nasals. 
c., canine. 
nar,, external nares. 
cond., condyle of mandible. 
orh., orbit. 
cor., coronoid process. 
pa., parietal. 
e.a.m., external auditory meatus. 
pm. 2-4, premolars. 
c.i’o., exoccipital. 
pmx., premaxilla. 
i. 1-d, incisors or alveoli of iiicisoi's. 
poc., paroccipital process. 
m.l-S, inolai-s. .'toe., supraoccipital. 
mental foramen. squamosal, 
maxilla. 
